The Default_L2Tp_Vpn_Gw Ipsec Vpn Rule - ZyXEL Communications SBG5500 Series User Manual

Table 73 VPN Connection: Add/Edit
LABEL
Encryption
Authentication
Perfect Forward Secrecy
(PFS)
OK
Cancel

10.5.3 The Default_L2TP_VPN_GW IPsec VPN Rule

A default IPsec VPN rule (Default_L2TP_VPN_GW) is predefined. It can be edited but cannot be
removed. This rule is used for L2TP VPN exclusively and is disabled by default.
The following table lists the default settings for the Default_L2TP_VPN_GW IPsec VPN.
Table 74 Default settings for Default_L2TP_VPN_GW
Enabled
Nailed-up
NAT Traversal
Application Scenario
My Address
Life time
Negotiation Mode
Chapter 10 VPN
DESCRIPTION
This field is applicable when the Active Protocol is ESP. Select which key size and
encryption algorithm to use in the IPsec SA. Choices are:
None - no encryption key or algorithm
3DES - a 168-bit key with the DES encryption algorithm
AES128 - a 128-bit key with the AES encryption algorithm
AES192 - a 192-bit key with the AES encryption algorithm
AES256 - a 256-bit key with the AES encryption algorithm
The SBG and the remote IPsec router must both have at least one proposal that uses
use the same encryption and the same key.
Longer keys are more secure, but require more processing power, resulting in
increased latency and decreased throughput.
Select which hash algorithm to use to authenticate packet data in the IPsec SA.
Choices are SHA1, SHA256, and SHA512.
The SBG and the remote IPsec router must both have a proposal that uses the same
authentication algorithm.
Select whether or not you want to enable Perfect Forward Secrecy (PFS) and, if you
do, which Diffie-Hellman key group to use for encryption. Choices are:
DH2 - enable PFS and use a 1024-bit random number
DH5 - enable PFS and use a 1536-bit random number
DH14 - enable PFS and use a 2048-bit random number
PFS changes the root key that is used to generate encryption keys for each IPsec SA.
The longer the key, the more secure the encryption, but also the longer it takes to
encrypt and decrypt information. Both routers must use the same DH key group.
Click OK to save your changes.
Click Cancel to restore your previously saved settings.
GENERAL
No
No
Yes
Remote Access
Any
PHASE 1
86400
Main
SBG5500/3310 Series User's Guide
174
AUTHENTICATION
Pre-Shared Key
Certificate
Local ID Type
Content
Remote ID Type
PHASE 2
Life time
Tunnel Mode
none
none
IP
0.0.0.0
Any
3600
ESP